I have an image of size 256 X 256. I downsampled the image row wise and column wise by 2 and my output is 128 X 128. Now if I Upsample the image by 2, then my final resultant image is of size 256 X 256. I know that upsampling means inserting zeros between the rows and columns.
If I use this upsampled image in my image processing, then is it something like I am using 50% of my original image data to represent the output?.